All reports of depends-on-libdb1-compat for the archive. The extended description of this tag is:

The package seems to declare a relation on libdb1-compat. This library exists for compatibility with applications built against glibc 2.0 or 2.1. There is intentionally no corresponding development package. Do not link new applications against this library!

Severity: important, Certainty: certain

Check: fields, Type: binary, udeb, source

This tag has not been emitted in any package tested by Lintian.